# app4sail vs Seapilot

The clearest difference is price: Seapilot at Free against app4sail's $4.99. Seapilot also leads on iOS requirement (9.3 vs 12.0). app4sail's advantage is in-app purchases (none vs 18). On update cadence, ads and device support there is nothing between them.

Seapilot is free to download; app4sail costs $4.99 up front. Seapilot sells 18 in-app purchases, starting at $8.99 per year. app4sail asks for nothing beyond the download.

app4sail ships an update every 4 months, Seapilot every 3 months. The most recent releases landed on June 7, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | app4sail | Seapilot |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | — | **[2.9 (15 ratings)](https://appshunter.io/ios/app/seapilot/id915818783/reviews)** |
| Number of ratings | — | **15** |
| Positive reviews | — | 38.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | — | Free with in-app purchases |
| Size | 10 MB | 107 MB |
| Requires iOS | 12.0 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [anton van oosten](https://appshunter.io/developer/641322651) | [Seapilot](https://appshunter.io/developer/449148590) |

## What reviewers say

### app4sail

[App page](https://appshunter.io/ios/app/app4sail/id641578574)

**Features:** macOS Compatibility

**In-app purchases:** none


### Seapilot

[App page](https://appshunter.io/ios/app/seapilot/id915818783)

Navigate like a professional with this marine navigation app. It offers vectorized chart data, AIS, and weather forecasts, bringing merchant shipping technology to your mobile device. Plan trips, track your vessel, and access advanced navigation tools.

**Highlights:** Vectorized S-57 chart data, Automatic Identification System (AIS), Built-in weather forecasts, Positioning and background positioning via GPS, Man Overboard function, Premium features like Weather Routing

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (18)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Swedish charts with automatic updates | $8.99 | per year |
| East Canadian charts | $14.49 | per year |
| West Canadian | $14.49 | per year |
| Spanish charts with automatic updates | $17.49 | per year |
| Finnish charts | $19.49 | per year |
| Dutch charts | $19.49 | per year |
| Irish charts | $19.49 | per year |
| British charts | $19.49 | per year |
| German charts | $23.49 | per year |
| Croatian charts with automatic updates | $26.49 | per year |
| Portuguese charts with automatic updates | $26.49 | per year |
| Greek charts with automatic updates | $34.99 | per year |
| Premium | $39.99 | per year |
| French charts | $50.99 | per year |
| US East | Free | one-time |
| US West | Free | one-time |
| US-Great Lakes. One year subscription. | $11.99 | one-time |
| US-West. One year subscription. | $13.99 | one-time |


## Frequently asked questions

### Is app4sail free?

app4sail costs $4.99, with no in-app purchases.

### Is Seapilot free?

Seapilot is free to download, with in-app purchases available.

### Do app4sail or Seapilot have ads?

Neither app4sail nor Seapilot shows ads.

### Which is updated more often, app4sail or Seapilot?

app4sail ships an update every 4 months, and Seapilot every 3 months. Most recently, app4sail was updated on June 7, 2026 and Seapilot on September 11, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*